WO2010040898A1 - System and method for storing multi-source multimedia presentations - Google Patents
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- WO2010040898A1 WO2010040898A1 PCT/FI2009/050795 FI2009050795W WO2010040898A1 WO 2010040898 A1 WO2010040898 A1 WO 2010040898A1 FI 2009050795 W FI2009050795 W FI 2009050795W WO 2010040898 A1 WO2010040898 A1 WO 2010040898A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
- H04N21/8352—Generation of protective data, e.g. certificates involving content or source identification data, e.g. Unique Material Identifier [UMID]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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- H—ELECTRICITY
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
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- H—ELECTRICITY
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
- H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
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- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
- H04N21/4325—Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
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- H—ELECTRICITY
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- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
- H04N21/4788—Supplemental services, e.g. displaying phone caller identification, shopping application communicating with other users, e.g. chatting
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- H—ELECTRICITY
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- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
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- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8543—Content authoring using a description language, e.g. Multimedia and Hypermedia information coding Expert Group [MHEG], eXtensible Markup Language [XML]
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Definitions
- Various embodiments relate generally to the storage of multimedia presentations. More particularly, various embodiments relate to the storage of multi- source multimedia presentations in files for local playback or transmission, where multi-source multimedia presentations refer to those multimedia presentations that render more than one media stream for at least one type of media.
- the file format is an important element in the chain of multimedia content production, manipulation, transmission and consumption. There is a difference between the coding format and the file format.
- the coding format relates to the action of a specific coding algorithm that codes the content information into a bitstream.
- the file format comprises a mechanism for organizing the generated bitstream in such way that it can be accessed for local decoding and playback, transferred as a file, or streamed, all utilizing a variety of storage and transport architectures.
- the file format can be used to facilitate the interchange and editing of the media. For example, many streaming applications require a pre-encoded bitstream on a server to be accompanied by metadata (stored in "hint-tracks") that assists the server in streaming the video to the client.
- a hint track does not contain media data, but instead contains instructions for packaging one or more tracks into a streaming channel.
- Available media file format standards include the International Organization for Standardization (ISO) base media file format (ISO/International Electrotechnical Commission (IEC) 14496-12) (also referred to as the ISO file format in short), the Moving Picture Experts Group (MPEG)-4 file format (ISO/IEC 14496-14), the Advanced Video Coding (AVC) file format (ISO/IEC 14496-15) and the 3 rd Generation Partnership Project (3GPP) file format (3GPP TS 26.244). Efforts are also underway in MPEG for the development of the Scalable Video Coding (SVC) file format and the Multiview Video Coding (MVC) file format, which are expected to become two amendments to the AVC file format.
- ISO International Organization for Standardization
- ISO International Organization for Standardization
- MPEG Moving Picture Experts Group
- AVC Advanced Video Coding
- 3GPP 3 rd Generation Partnership Project
- the ISO file format is the basis for derivation of all the above-identified file formats (excluding the ISO file format itself). These file formats (including the ISO file format itself) are referred to as the ISO family of file formats. According to the ISO family of file formats, each file contains exactly one movie box corresponding to one presentation.
- the movie box may contain one or more tracks, and each track resides in one track box.
- one media type e.g., audio or video
- one track is typically selected, though it is possible for there to be more than one track storing information of a certain media type.
- a subset of these tracks may form an alternate track group, where each track is independently decodable and can be selected for playback.
- receivers In multiparty conferencing, receivers typically display videos from a selected subset of participants in split-screen windows, e.g. an arrangement is illustrated in Figure 6.
- a multipoint control unit may transcode the incoming video streams of the selected subset of participants to one video stream, which contains all the video contents from the selected subset of participants.
- the MCU can simply forward the incoming video streams of the selected subset of participants to the receivers, after which each video stream is decoded individually.
- Receivers may want to store multiparty conferencing presentations for future use.
- the current standard file format designs do not support the storage of presentations of multiparty video conferences, if the MCU forwards streams to participants.
- a receiver may store the video streams to be displayed in separate video tracks according to existing file format designs, e.g., the ISO base media file format.
- existing file format designs e.g., the ISO base media file format.
- a player that takes the file as input has no way of knowing which video tracks should be decoded and how to display the respective video tracks.
- other types of multi- source multimedia presentations that render more than one media stream for at least one type of media are possible.
- Examples of such other application scenarios include, e.g.: recorded video telephony, where there are two participants, the caller and the answerer; video surveillance, where there may be a large number of cameras (possibly equipped with audio sensors), that would send audio-visual signals to a control center; and recorded training-like presentations, where presentation slides and one or more talker(s) may be recorded in separate media streams and later both displayed.
- Various embodiments provide a file format design that supports the storage of multi- source multimedia presentations. This support is enabled via the inclusion of indications as to whether a presentation is a multi-source presentation, and for one media type, the tracks of which are from different sources and should be played simultaneously. If the presentation is a multi-source presentation, additional indications may be provided including, but not limited to the following: an indication of the type of multi- source presentation being stored; indications regarding the source of each track and which tracks are from the same source; indications indicative of different parties' information such as phone numbers, participant names, camera identifiers, position descriptions, etc.; indications of how to display the decoded video streams in a split-screen window; as well as indications of the auditory or visual activity level.
- a player is capable of playing back a recorded video telephony presentation, a recorded multiparty video conferencing presentation, a recorded video surveillance presentation, or a recorded training-like presentation in the same or substantially the same manner as it was presented during the actual session. Additionally, the presentation may be automatically manipulated by the player to make the presentation more informative or more efficient.
- the file format design in accordance with various embodiments also supports the storage of other types of multi- source presentations that render more than one media stream for at least one type of media.
- Figure 1 is a representation of a generic multimedia communications system for use with various embodiments of the present invention
- Figure 2 is a flow chart illustrating exemplary processes performed in an encoding procedure in accordance with various embodiments
- Figure 3 is a flow chart illustrating exemplary processes performed in a decoding procedure in accordance with various embodiments
- Figure 4 is a perspective view of an electronic device that can be used in conjunction with the implementation of various embodiments of the present invention.
- Figure 5 is a schematic representation of the circuitry which may be included in the electronic device o f Figure 4.
- Figure 6 is a schematic representation of an arrangement of multi-picture display.
- Various embodiments include a file format design that supports the storage of multi-source multimedia presentations that is enabled via the inclusion of indications as to whether a presentation is a multi-source presentation, and for one media type, the tracks of which are from different sources and should be played simultaneously. If the presentation is a multi- source presentation, additional indications may be provided.
- Such additional indications/signifiers can include, but are not limited to the following indications: an indication of the type of multi- source presentation being stored; indications regarding the source of each track and which tracks are from the same source; indications indicative of different parties' information such as phone numbers, participant names, camera identifiers, position descriptions, etc.; indications of how to display the decoded video streams in a split- screen window; as well as indications of the auditory or visual activity level.
- a player may play back, e.g., a recorded video telephony presentation, a recorded multiparty video conferencing presentation, a recorded video surveillance presentation, or a recorded training- like presentation in the same or substantially the same manner as it was presented during the actual session. Additionally, the presentation may be automatically manipulated by the player to make the presentation more informative or more efficient.
- the file format design in accordance with various embodiments also supports the storage of other types of multi-source presentations that render more than one media stream for at least one type of media.
- a conventional MovieHeaderBox is changed as follows, such that some of the reserved bits are, e.g., used as signifiers to indicate whether a presentation contained in the file is a multi- source presentation, and if so, the type of the multi- source presentation:
- a multisource_presentation value of 1 may specify a video telephony presentation
- a multisource_presentation value of 2 may specify a video conferencing presentation
- a multisource_presentation value of 3 may specify a video surveillance presentation
- a multisource_presentation value of 4 may specify training-like presentations, and so on.
- other types of multi- source presentations may be indicated/signified in accordance with various embodiments, and that the indicators/signifiers can be configured as desired, to be representative of the various types of multi- source presentations.
- multisource_presentation value is not equal to 0, it is known that all of the tracks belong to a multi-source presentation. In the event that a number of tracks form an alternate track group, only one of them is selected for playback.
- Multisource Track Grouping Box is defined as follows:
- This box specifies the grouping of tracks for a multi-source presentation.
- An exemplary syntax for use in implementing this embodiment is as follows:
- version refers to an integer that specifies the version of this box (equal to 0 in this instance)
- flags is a 24-bit integer with flags (equal to 0 in this instance)
- number media types specifies the number of media types involved in the multi-source presentation. For example, if there are only audio and video involved in the presentation, the value of "num media types” is equal to 2.
- media type name specifies the name of the current media type (associated with the value of i), which may be the same as that defined by "handler type” integer in the Handler Reference Box. For example, 'vide' specifies a video media type, and 'soun' specifies an audio media type.
- number media sources specifies the number of sources for the current media type (associated with the value of i).
- media source id specifies the identifier of the current media source (associated with the value of j) for the current media type (associated with the value of i).
- the source identifier may be any type of an identifier besides a 16-bit unsigned integer, e.g., a Universal Unique Identifier (UUID), a Uniform Resource Locator (URL), an Internet Protocol (IP) address, a Medium Access Control (MAC) address, a location & orientation, or any combination thereof
- UUID Universal Unique Identifier
- URL Uniform Resource Locator
- IP Internet Protocol
- MAC Medium Access Control
- location & orientation or any combination thereof
- source info is a null-terminated string in UTF-8 characters which gives human-readable information regarding the source.
- the participant name, phone number, and or other relevant information regarding this source is included in “source info”.
- the value of "multisource_presentation” is 3 (video surveillance)
- the camera identifier and position description for this source is included in the "source info” string
- "num alternate tracks” specifies the number of alternate tracks for the current media source (associated with the value of j) for the current media type (associated with the value of i).
- alternate track id specifies the track identifier of the current alternate track (associated with the value of k) for the current media source (associated with the value of j) for the current media type (associated with the value of i). For one media source of one media type, only one of the alternate tracks is selected to be decoded and rendered. Different media types can be mapped by the same value of media source identifier specified by "media source id". For example, in a video surveillance presentation, an audio track and a video track having the same media source identifier are considered to be from the same source (i.e., the same location is monitored by a sensor that has captured both audio and video signals).
- Various embodiments also involve providing the same indications (as described above) locally to each track, instead of globally in association with the MovieHeaderBox and the MultisourceTrackGroupingBox.
- certain new track reference types are defined, each corresponding to one multi-source presentation type.
- the reference types 'tlfh', 'conf , 'surv' and 'pres' are defined, for video telephony, video conferencing, video surveillance, and training-like presentations, respectively.
- each track that belongs to a multi-source presentation contains a TrackReferenceTypeBox of one of the above four types (i.e., with reference type equal to one of the above four types).
- the track ID of each track belonging to the same multi- source conference presentation is equal to one of the track IDs present in the TrackReferenceTypeBox of one of the above four types.
- a file reader can obtain information regarding which tracks belong to a multi-source presentation by checking all the tracks. In the event that more than one track containing a
- TrackReferenceTypeBox of one of the above four types form an alternate track group, then only one of them is selected for playback.
- only one new track reference of type 'msrc' is defined for all multi- source presentation types, such that for each of the other tracks of the same source, the track ID is included in the TrackReferenceTypeBox of type 'msrc'.
- the type of the presentation can be included elsewhere, e.g. in a track level box.
- a source identifier is included in each track, either in a new box or in a track- level box, e.g., the media information box or the track header box.
- the source identifier may be any type of an identifier, e.g. unsigned integer, Universal Unique Identifier (UUID), Uniform Resource Locator (URL), Internet Protocol (IP) address, Medium Access Control (MAC) address, location & orientation, or any combination thereof.
- UUID Universal Unique Identifier
- URL Uniform Resource Locator
- IP Internet Protocol
- MAC Medium Access Control
- the presence of such a new box that contains the source identifier can be used as an indication that the track belongs to a multi-source presentation.
- the player can choose one track for each value of source identifier, and play all these tracks from difference sources simultaneously.
- the participants' names and phone numbers or camera identifiers and position descriptions, etc. may also be included in the same box.
- Various embodiments also involve providing indications as to how the decoded video streams should be displayed in a split-screen.
- a new sample grouping of type 'sswp' is defined to specify the split-screen window position where each sample of a track should be displayed.
- each video track that belongs to a multi-source presentation includes a SampleToGroupBox with grouping type equal to 'sswp' and a SampleGroupDescriptionBox with grouping type equal to 'sswp'.
- the SampleToGroupBox maps each sample to a split-screen window position sample group, and each sample group typically contains multiple samples.
- a SswpSampleGroupEntry as defined below is included in the SampleGroupDescriptionBox to document the position in the split-screen window where each sample of the corresponding sample group should be displayed:
- the entire area of one video source, represented by samples of the corresponding sample group, can be displayed over multiple split-screen windows or one split-screen window.
- the whole screen is divided into a number of split-screen windows and a split-screen window shall either contain no video source or have its full area occupied by just one video source.
- 'sswp x' specifies the horizontal coordinate of the split-screen window where the top-left area represented by the samples of the corresponding sample group should be displayed.
- the top-left split-screen window has a 'sswp x' equal to 0.
- 'sswp y' specifies the vertical coordinate of the split-screen window where the top-left area represented by the samples of the corresponding sample group should be displayed.
- the top-left split-screen window has a sswp_y equal to 0.
- 'sswp_w' specifies the width of the display area wherein samples of the corresponding sample group should be displayed.
- the unit is the width of a split-screen window
- 'sswp h' specifies the height of the display area wherein samples of the corresponding sample group should be displayed.
- the unit is the height of a split-screen window. Displaying of the samples covers the split- screen windows with horizontal coordinate in the scope of sswp x to (sswp_x+sswp_w-l), inclusive, and vertical coordinate in the scope of sswp_y to (sswp_y+sswp_h-l), inclusive.
- both sswp w and sswp h are equal to 1 , the samples are displayed exactly in one split- screen window which has coordinates (sswp_x, sswp_y).
- a new box is included in each track to signal the same display information as above for each segment of decoding time or composition (i.e., display) time.
- Various embodiments also involve providing indications as to whether a party or participant is active.
- a new sample grouping of type 'actv' is defined to specify whether the party or participant, at the time of each sample in the track, is active or not.
- each track that belongs to a multi-source presentation includes a SampleToGroupBox with a grouping type equal to 'actv'.
- the SampleToGroupBox maps each sample to an active or inactive sample group, and each sample group typically contains multiple samples.
- an ActiveSampleGroupEntry as defined below is included in the SampleGroupDescriptionBox to document whether the samples in the corresponding sample group are active or inactive:
- ActiveSampleGroupEntry() extends VisualSampleGroupEntry('actv') ⁇ unsigned int(8) sample_active; ⁇
- a sample active equal to 0 specifies that the samples of the corresponding sample group are inactive, whereas a sample active equal to 1 specifies that the samples of the corresponding sample group are active.
- the value of sample active specifies the relative active level of the samples of the corresponding sample group, where a 0 value indicates completely inactive samples, and a value of 255 indicates the maximum level of activity. Any higher value of sample active can be used to indicate a higher level of activity.
- this information is signaled in a new global box, e.g., a global box contained in the Movie Box.
- the player of the file can automatically determine which participant(s) in a video telephony or conferencing session are talking, and select the video of that participant(s) to be displayed in a larger size, in full- window, in full-screen, etc.
- the player can also avoid the playback of inactive periods.
- a new box is defined to be contained in each track box. This new box contains a loop, for which the number of entries is equal to the number of samples in the track. Each entry of the loop contains an 8-bit sample active field, with semantics similar to that described above.
- a timed metadata track is included in the file for each media track.
- Samples of a timed metadata track are time-aligned with samples of the corresponding media track. Additionally, the activity of each media sample can be indicated by an 8-bit sample active field in the corresponding timed metadata sample, the semantics of sample active again being similar to that described above.
- hint tracks each corresponding to a media track (e.g. an audio track or a video track).
- Figure 1 is a graphical representation of a generic multimedia communication system within which various embodiments of the present invention may be implemented.
- a data source 100 provides a source signal in an analog, uncompressed digital, or compressed digital format, or any combination of these formats.
- An encoder 110 encodes the source signal into a coded media bitstream. It should be noted that a bitstream to be decoded can be received directly or indirectly from a remote device located within virtually any type of network. Additionally, the bitstream can be received from local hardware or software.
- the encoder 110 may be capable of encoding more than one media type, such as audio and video, or more than one encoder 110 may be required to code different media types of the source signal.
- the encoder 110 may also get synthetically produced input, such as graphics and text, or it may be capable of producing coded bitstreams of synthetic media. In the following, only processing of one coded media bitstream of one media type is considered to simplify the description. It should be noted, however, that typically real-time broadcast services comprise several streams (typically at least one audio, video and text sub-titling stream). It should also be noted that the system may include many encoders, but in Figure 1 only one encoder 110 is represented to simplify the description without a lack of generality. It should be further understood that, although text and examples contained herein may specifically describe an encoding process, one skilled in the art would understand that the same concepts and principles also apply to the corresponding decoding process and vice versa.
- the coded media bitstream is transferred to a storage 120.
- the storage 120 may comprise any type of mass memory to store the coded media bitstream.
- the format of the coded media bitstream in the storage 120 may be an elementary self-contained bitstream format, or one or more coded media bitstreams may be encapsulated into a container file. Some systems operate "live", i.e. omit storage and transfer coded media bitstream from the encoder 110 directly to the sender 130.
- the coded media bitstream is then transferred to the sender 130, also referred to as the server, on a need basis.
- the format used in the transmission may be an elementary self-contained bitstream format, a packet stream format, or one or more coded media bitstreams may be encapsulated into a container file.
- the encoder 110, the storage 120, and the server 130 may reside in the same physical device or they may be included in separate devices.
- the encoder 110 and server 130 may operate with live real-time content, in which case the coded media bitstream is typically not stored permanently, but rather buffered for small periods of time in the content encoder 110 and/or in the server 130 to smooth out variations in processing delay, transfer delay, and coded media bitrate.
- the server 130 sends the coded media bitstream using a communication protocol stack.
- the stack may include but is not limited to Real-Time Transport Protocol (RTP), User Datagram Protocol (UDP), and Internet Protocol (IP).
- RTP Real-Time Transport Protocol
- UDP User Datagram Protocol
- IP Internet Protocol
- the server 130 encapsulates the coded media bitstream into packets.
- RTP Real-Time Transport Protocol
- UDP User Datagram Protocol
- IP Internet Protocol
- the server 130 encapsulates the coded media bitstream into packets.
- RTP Real-Time Transport Protocol
- UDP User Datagram Protocol
- IP Internet Protocol
- the server 130 may or may not be connected to a gateway 140 through a communication network.
- the gateway 140 may perform different types of functions, such as translation of a packet stream according to one communication protocol stack to another communication protocol stack, merging and forking of data streams, and manipulation of data stream according to the downlink and/or receiver capabilities, such as controlling the bit rate of the forwarded stream according to prevailing downlink network conditions.
- Examples of gateways 140 include MCUs, gateways between circuit-switched and packet-switched video telephony, Push-to-talk over Cellular (PoC) servers, IP encapsulators in digital video broadcasting-handheld (DVB-H) systems, or set-top boxes that forward broadcast transmissions locally to home wireless networks.
- the gateway 140 is called an RTP mixer or an RTP translator and typically acts as an endpoint of an RTP connection.
- the system includes one or more receivers 150, typically capable of receiving, demodulating, and de-capsulating the transmitted signal into a coded media bitstream.
- the coded media bitstream is transferred to a recording storage 155.
- the recording storage 155 may comprise any type of mass memory to store the coded media bitstream.
- the recording storage 155 may alternatively or additively comprise computation memory, such as random access memory.
- the format of the coded media bitstream in the recording storage 155 may be an elementary self-contained bitstream format, or one or more coded media bitstreams may be encapsulated into a container file.
- a container file is typically used and the receiver 150 comprises or is attached to a container file generator producing a container file from input streams.
- Some systems operate "live,” i.e. omit the recording storage 155 and transfer coded media bitstream from the receiver 150 directly to the decoder 160.
- only the most recent part of the recorded stream e.g., the most recent 10-minute excerption of the recorded stream, is maintained in the recording storage 155, while any earlier recorded data is discarded from the recording storage 155.
- the coded media bitstream is transferred from the recording storage 155 to the decoder 160. If there are many coded media bitstreams, such as an audio stream and a video stream, associated with each other and encapsulated into a container file, a file parser (not shown in the figure) is used to decapsulate each coded media bitstream from the container file.
- the recording storage 155 or a decoder 160 may comprise the file parser, or the file parser is attached to either recording storage 155 or the decoder 160.
- the codec media bitstream is typically processed further by a decoder 160, whose output is one or more uncompressed media streams.
- a renderer 170 may reproduce the uncompressed media streams with a loudspeaker or a display, for example.
- the receiver 150, recording storage 155, decoder 160, and renderer 170 may reside in the same physical device or they may be included in separate devices.
- Figure 2 is a flow chart illustrating exemplary processes performed in a file composing procedure in accordance with various embodiments. It should be noted that more or less processes may be performed in accordance with various embodiments.
- a file including a plurality of tracks therein is stored.
- at least one first indication regarding whether the plurality of tracks belong to a multi-source presentation that renders more than one media stream for at least one type of media is provided in the file.
- a second indication related to how the plurality of tracks belonging to the multi- source presentation is to be rendered is provided in the file.
- Figure 3 is a flow chart illustrating exemplary processes performed in a file parsing procedure in accordance with various embodiments. It should be noted that more or less processes may be performed in accordance with various embodiments.
- a plurality of tracks are identified via at least one first identification, within a file as belonging to a multi-source presentation from which more than one media stream is to be rendered for at least one type of media.
- a second indication related to how the plurality of tracks belonging to the multi-source presentation is to be rendered is retrieved from the file.
- each track identified as belonging to the multi-source presentation is rendered.
- Communication devices of the present invention may communicate using various transmission technologies including, but not limited to, Code Division Multiple Access (CDMA), Global System for Mobile Communications (GSM), Universal Mobile Telecommunications System (UMTS), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Transmission Control Protocol/Internet Protocol
- CDMA Code Division Multiple Access
- GSM Global System for Mobile Communications
- UMTS Universal Mobile Telecommunications System
- TDMA Time Division Multiple Access
- FDMA Frequency Division Multiple Access
- a communication device may communicate using various media including, but not limited to, radio, infrared, laser, cable connection, and the like.
- FIGS 4 and 5 show one representative electronic device 12 within which various embodiments may be implemented. It should be understood, however, that various embodiments are not intended to be limited to one particular type of device.
- the electronic device 12 of Figures 4 and 5 includes a housing 30, a display 32 in the form of a liquid crystal display, a keypad 34, a microphone 36, an ear-piece 38, a battery 40, an infrared port 42, an antenna 44, a smart card 46 in the form of a UICC according to one embodiment, a card reader 48, radio interface circuitry 52, codec circuitry 54, a controller 56 and a memory 58. Individual circuits and elements are all of a type well known in the art.
- a computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM), Random Access Memory (RAM), compact discs (CDs), digital versatile discs (DVD), etc.
- program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types.
- Computer-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein.
Abstract
Description
Claims
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KR1020117010553A KR101296059B1 (en) | 2008-10-08 | 2009-10-02 | System and method for storing multisource multimedia presentations |
CN200980149283.3A CN102246491B (en) | 2008-10-08 | 2009-10-02 | System and method for storing multi-source multimedia presentations |
RU2011117609/08A RU2497298C2 (en) | 2008-10-08 | 2009-10-02 | System and method to store multimedia presentations having several sources |
EP20090818848 EP2345228A4 (en) | 2008-10-08 | 2009-10-02 | System and method for storing multi-source multimedia presentations |
CA2740119A CA2740119C (en) | 2008-10-08 | 2009-10-02 | System and method for storing multi-source multimedia presentations |
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EP (1) | EP2345228A4 (en) |
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CN104427374B (en) * | 2013-08-27 | 2018-03-20 | 海尔集团公司 | Display control method, device and the multimedia equipment of content of multimedia |
KR101974200B1 (en) * | 2014-04-14 | 2019-04-30 | 삼성전자주식회사 | Multi display system, electronic apparatus and method for outputting a content |
WO2018179903A1 (en) * | 2017-03-27 | 2018-10-04 | Sharp Kabushiki Kaisha | Systems and methods for signaling of information associated with most-interested regions for virtual reality applications |
CN109218809B (en) * | 2017-06-30 | 2021-07-30 | 武汉斗鱼网络科技有限公司 | Streaming media playing method and device |
CN109600652B (en) * | 2017-09-30 | 2022-03-29 | 中兴通讯股份有限公司 | Method for playing multi-channel video by mobile terminal, mobile terminal and readable storage medium |
CN110035316B (en) * | 2018-01-11 | 2022-01-14 | 华为技术有限公司 | Method and apparatus for processing media data |
CN112237005B (en) * | 2018-04-05 | 2023-11-07 | Vid拓展公司 | Viewpoint metadata for omni-directional video |
US20220150597A1 (en) * | 2019-05-03 | 2022-05-12 | The Santa Fe Opera | Interactive electronic libretto/translation hd display interface apparatus and method |
CN114051194A (en) * | 2021-10-15 | 2022-02-15 | 赛因芯微(北京)电子科技有限公司 | Audio track metadata and generation method, electronic equipment and storage medium |
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US9357274B2 (en) | 2016-05-31 |
TWI501609B (en) | 2015-09-21 |
TW201031159A (en) | 2010-08-16 |
US20100199183A1 (en) | 2010-08-05 |
CN102246491A (en) | 2011-11-16 |
CN102246491B (en) | 2014-11-12 |
KR20110069855A (en) | 2011-06-23 |
CA2740119C (en) | 2013-07-23 |
EP2345228A1 (en) | 2011-07-20 |
KR101296059B1 (en) | 2013-08-12 |
RU2011117609A (en) | 2012-11-20 |
EP2345228A4 (en) | 2012-08-22 |
RU2497298C2 (en) | 2013-10-27 |
CA2740119A1 (en) | 2010-04-15 |
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